Fisheye (noun)

A slang term describing the situation when having intercourse with a woman from behind you start to put it in her ass, at which time she quickly snaps her head to the side and looks back at you with one eye (like a fish).

ACTUALLY, the fisheye is when you're doing a girl doggystyle and with no warning whatsoever, you put in her butt. She'll suddenly open her mouth in kind of a frown and swing her head around, but all you can see is one of her eyes wide open, making her look like a fish.

The fish eye occurs when doing a girl from behind, or doggie style if you will, and then suddenly and without warning, attempting, purposely or accidentally, to lodge it in her pooper. She will most certainly become wide-eyed and turn her head to look at you in horror. From your angle ou would only be able to see one wide open eye - resembling a fish eye.

when one peers over their shoulder while receiving sex from behind

During sex, while working from behind, you shove your finger in her pooper. Thereupon, she turns around in a one-eyed winking motion to see what the hell you are doing.

when doing a chick "doggy-style", you quickly, and without warning pull out of her vag and shove it into her ass in one stroke. she will then turn around with large bugged out eyes at the shock. and, if you manage to catch your finger hooked in her gaping mouth during this, you've completed a fish-hook.

Someone, usually a girl, with eyes on the sides of their head.